Because there isn't one. Now this may sound a little glib and I suppose it is, however, since you're reading this then it did everything it's supposed to. And that's to interest you enough to start reading article.
Now back to point. Almost every week there's a new article or theory that gets passed around internet with next miracle cure for your poor search engine results. And you shouldn't believe any of them.
Think about it, is there one single change you can make to your product or service that will suddenly triple or even quadruple your revenue? The answer is no, and reason is that your potential clients are more sophisticated than that. And same of course goes for search engines.
To get page one rankings within major search engines for types of terms users actually search for is not cheap or easy. It is going to take an awful lot of time, money and effort. And this is main point, most businesses will never see an adequate return.
Think about it. Most businesses would benefit from a massive advertising campaign in relevant magazines with an integrated web, direct mail and sales campaign. However, it’s just not practical even though you would get results. The web is no different.